Okay a couple of minor criticisms. Isner's serve is terrific but he hasn't been around that long. I don't think he should be on the list quite yet. Roddick's serve is actually one of the best ever since he's often led the ATP in percentage of holding serve for a number of years. Considering that I don't think he has the all court skills or mobility of a Nadal or Federer, that says something for his serve. I'll look at it a little more when I had the time.